Journal
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
Volume 315, Issue 2, Pages 331-340Publisher
SPRINGER
DOI: 10.1007/s10967-017-5652-9
Keywords
Distribution coefficients; Kinetics; MWCNT-PAMAMGn; Neptunium; Sorption
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Herein, sorption of pentavalent neptunium from aqueous acidic solution was carried out onto 1st and 2nd generation of poly(amidoamine) dendrimer functionalized MWCNTs. The Np(V) sorption kinetics followed pseudo second order kinetics with rate constants of 1.4 x 10(-4) and 6.84 x 10(-4) g mg(-1) min(-1) for MWCNT-PAMAM(G1) and MWCNT-PAMAM(G2), respectively. The sorption of Np(V) onto MWCNT-PAMAM(Gn) proceeded via chemisorption and the data fitted well to Langmuir isotherm model. MWCNT-PAMAM(Gn) was found radiolytically stable up to 500 kGy dose of gamma radiation. Sodium carbonate was found to strip Np effectively from sorbent.
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